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OK guys i need your help big time

3K views 30 replies 14 participants last post by  F250Hoss 
#1 ·
long story short i have lost compression in cylinder #8:doh:. and i think the stealship is a joke can anyone link me to any good sources of info for tearing down a 2000 7.3L that would be greatly appreciated i diffently could use the help
 
#3 ·
i had the new cps and also 6''lift on 35's with a 5"mbrb exhaust with a K&N intake with a banks big hoss chip =/
121k miles im in san diego
 
#4 ·
and the turbo has failed.. lol
 
#5 ·
Some trucks have problems with #8 when they install the grey CPS. I remember one guy installed a new injector & HPOP & still didn't fix it till he went back to the black one.

I'm not saying this is the issue here but, something I would consider.
 
#10 ·
:whs: and or maybe consider looking into a fuel regulated return system,which would help no matter what the problem might be.Keep us informed,good luck hoss.:confused:
 
#6 ·
Hmm ill look into it but im almost positive i have the black cps but i will go back and look @ it. The truck is gonna be towed down to the hanger and im gonna scope each cylinder to inspect for any other damage what so ever cause im expecting the worst
 
#8 ·
All my compression nhumbers were fine except #8 it was totally dead..


I just need links to cylinder firing order
torq specs for each part of the motor so on and so forth. anything would be a big help
 
#11 ·
Here are some torque specs and other bits, hope this helps, its some i've collected up and saved.

Bore and Stroke 4.11 in x 4.18 in
Firing order 1-2-7-3-4-5-6-8
Oil pressure Note: Normal operating temperature @ 3,300rpm 40-70 psi
Engine type and number of cylinders V-8
Compression Ratio 17.5 to 1

--------------------------------------------
Valve Spring Compression
Note: Pressure lbs.@specified height Intake 71-79 lbs. @ 1.833 in
225-249 lbs. @ 1.352 in
Exhaust 71-79 lbs. @ 1.833 in
225-249 lbs. @ 1.352 in
Valve Spring Free Length (Approximate) Intake 2.075±0.150 in
Exhaust 2.075±0.150 in
Valve Spring Assembled Height Intake 1.767 in
Exhaust 1.833 in
Valve Spring Out of Square-Maximum 0.078 in

--------------

Valve Stem-to-Guide Clearance (Max) Intake 0.0055 in
Note: Service clearance-.0055.
Exhaust 0.0055 in
Note: Service clearance-.0055.
Valve Face Angle Intake 30°
Exhaust 37.5°
Valve Face Runout-TIR Maximum 0.002 in
Minimum Valve Face Margin-Intake Valves 0.066 in
Minimum Valve Face Margin-Exhaust Valves 0.054 in
Valve Stem Diameter 0.31185-0.31255 in
Valve Head Recession Relative to Deck Surface Intake 0.046-0.058 in
Exhaust 0.052-0.064 in -

-----------------------------------------------------------------------------

A/C manifold and tube retaining bolt 15 ft. lbs.
Air brake ABS module bracket assembly mounting nuts 15 ft. lbs.
Air cleaner housing mounting bolts 22 ft. lbs.
Air cleaner support bracket mounting nuts 21 ft. lbs.
Air compressor bracket mounting bolts 58 ft. lbs.
Air compressor mounting bolts 50 ft. lbs.
Air compressor mounting nuts 58 ft. lbs.
Belt tensioner mounting bolt 32 ft. lbs.
Camshaft position (CMP) sensor mounting bolt 18 ft. lbs.
Camshaft thrust plate retaining bolts 18 ft. lbs.
Connecting rod cap nuts Stage 1 53 ft.lbs. Stage 2 80 ft.lbs.
Cooling fan 74 ft. lbs.
Crankshaft rear oil seal retaining bolts 15 ft. lbs.
Crankshaft vibration dampener bolt 212 ft. lbs.
Cylinder head bolt
Note: Lightly lubricate the cylinder head bolt threads and flanges with clean engine oil. 
Stage 1 65 ft. lbs. Stage 2 85 ft. lbs. Stage 3 95 ft. lbs.
Drive gear access cover retaining bolts 20 ft. lbs.
Engine front cover bolts 15 ft. lbs.
Engine rear cover bolts 15 ft. lbs.
Exhaust bracket to engine support bracket mounting bolts 37 ft. lbs.
Exhaust manifold mounting pipe nuts and bolts 45 ft. lbs.
Engine support bracket mounting bolts 76 ft. lbs.
Flywheel/Flexplate bolts 89 ft. lbs.
Front stabilizer bar mounting nuts 98 ft. lbs.
Front support bracket to engine mounting bolts 76 ft. lbs.
Front support bracket to number two crossmember mounting nuts 166 ft. lbs.
Fuel return hose 19 ft. lbs.
Fuel supply hose 37 ft. lbs.
Flexplate mounting bolt (automatic transmission) 89 ft. lbs.
Flywheel mounting bolt (manual transmission) 89 ft. lbs.
Flywheel housing mounting bolts 15 ft. lbs.
Generator and compressor mounting bracket mounting bolts A/C 36 ft. lbs.
High-pressure oil line connector (cylinder head) 19 ft. lbs.
High-pressure oil pump drive gear mounting bolt 95 ft. lbs.
High-pressure oil pump mounting bolts 18 ft. lbs.
High-pressure oil pump reservoir mounting bolts 18 ft. lbs.
Idler pulley mounting bolt 41 ft. lbs.
Intake manifold cover mounting bolts 18 ft. lbs.
Main bearing cap bolts 

Stage 1 76 ft. lbs. Stage 2 96 ft. lbs.
Muffler assembly mounting nuts 37 ft. lbs.
Number two crossmember mounting bolts 66 ft. lbs.
Oil cooler retaining bolts 18 ft. lbs.
Oil level indicator tube adapter nut 24 ft. lbs.
Oil pan mounting bolts 18 ft. lbs.
Oil pump body plate bolts 15 ft. lbs.
Oil pump screen cover and tube flange bolts 18 ft. lbs.
Oil pump screen cover and tube retaining nut 38 ft. lbs.
Parking brake cable bracket mounting bolt (automatic transmission) 21 ft. lbs.
Parking brake cable clamp mounting bolts (manual transmission) 21 ft. lbs.
Power steering pressure hose 24 ft. lbs.
Power steering pump mounting nuts 41 ft. lbs.
Rear bracket to frame mounting nuts 184 ft. lbs.
Rear support cap mounting nuts 106 ft. lbs.
Rocker arm pedestal attaching bolts 20 ft. lbs.
Slave cylinder lock nut 24 ft. lbs.
Slave cylinder interlock bracket mounting bolts 44 ft. lbs.
Starter motor mounting bolts 38 ft. lbs.
Transmission oil cooler hoses 21 ft. lbs.
Transmission shift lever housing mounting bolts 40 ft. lbs.
Turbocharger exhaust inlet pipe-to-exhaust manifold bolts 21 ft. lbs.
Turbocharger mounting bolts 18 ft. lbs.
Turbocharger pedestal assembly mounting bolts 18 ft. lbs.
Water pump bolts 18 ft. lbs.
Valve cover retaining bolts and nuts 8 ft. lbs.

Grade 5 UNC Fasteners
1/4-inch 80 inch lbs.
5/16-inch 15 ft. lbs.

Grade 5 UNF Fasteners
1/4-inch 9 ft. lbs.
5/16-inch 17 ft. lbs.

Grade 8 UNC Fasteners
3/8-inch 41 ft. lbs.
7/16-inch 66 ft. lbs.
1/2-inch 96 ft. lbs.
9/16-inch 140 ft. lbs.
5/18-inch 188 ft. lbs.
3/4-inch 339 ft. lbs.
7/8-inch 550 ft. lbs.

Grade 8 UNF Fasteners
3/8-inch 44 ft. lbs.
7/16-inch 70 ft. lbs.
1/2-inch 111 ft. lbs.
9/16-inch 155 ft. lbs.
5/18-inch 214 ft. lbs.
3/4-inch 380 ft. lbs.
7/8-inch 616 ft. lbs.

Class 9.8 Metric Fasteners
M4 27 inch lbs.
M5 62 inch lbs.
M6 8 ft. lbs.
M8 20 ft. lbs.
M10 38 ft. lbs.
M12 58 ft. lbs.
M14 92 ft. lbs.
M16 142 ft. lbs.

Class 10.9 Metric Fasteners
M6 10 ft. lbs.
M8 26 ft. lbs.
M10 50 ft. lbs.
M12 74 ft. lbs.
M14 118 ft. lbs.
M16 183 ft. lbs.
M20 357 ft. lbs.
M24 618 ft. lbs.

Pipe Threads
1/8x27 80 inch lbs.
1/4x18 15 ft. lbs.
3/8x18 27 ft. lbs.
1/2x14 30 ft. lbs. -
 
#14 ·
Go down to your local parts house and invest 15 bucks or so on a Chiltons manual. It has all of this stuff in it. Not trying to be a a$$hole or anything, but it is the first thing I buy for every vehicle I have ever owned. When I sell the car, it goes with it, just like the jack and the ice scraper.

However, we will help you out with everything we can. And as a group, you would be hard pressed to find more knowledge anywhere.
 
#15 ·
Go down to your local parts house and invest 15 bucks or so on a Chiltons manual. It has all of this stuff in it. Not trying to be a a$ or anything, but it is the first thing I buy for every vehicle I have ever owned. When I sell the car, it goes with it, just like the jack and the ice scraper.

However, we will help you out with everything we can. And as a group, you would be hard pressed to find more knowledge anywhere.
You give them your ice scraper man I have had the same ice scraper for almost 10 years. I didn't even know they got ice it Texas LOL
 
#18 ·
haha yeah i just went and got a chiltons. I just wish it was easier to get like the dealership type books but they want waay too money for it. Thank you for all the specs btw that is awesome and will be very helpful.

And to continue with whats going on the dealship told me one of the issues was the turbo had "failed" due to the impeller's breaking apart... But on friday when i pulled the turbo it was perfectly fine.. So i really dont feel bad for saying what i said to the ford service manager since the truck had some work done a week before i had the failure.. I will never go to the dealship again. And i will keep updates on what i find more too come in the next day or so
 
#27 ·
If you want look on Ebay. You can buy the books that the dealerships have for our trucks. I think they run about $50 on there? I think that would be money well spent though. Then again I use the Chilton manuals all the time, and the work good enough for me.
 
#19 ·
Back to that dead cylinder. How did you run your comp check? What were the numbers on all 8 cylinders.

Any play in the impeller shaft? did you open the comp housing and or exhaust housing to look at the entire assembly?
 
#20 ·
The impeller shaft was solid. There was zero play. and we did take the turbo apart and check everything out. Everything looked fine.
Ford did a "cross cylinder balance check" im not very familer with that but im also going back down there today to get all the info they the gathered with looking @ the truck.
Since i really dont trust what they have said i will be doing my own comp check this week and also scope each cylinder
 
#23 ·
Sounds like either a cylinder contribution test or a rotational velocity test. Get what you can from the dealer and let us know. With either of those showing bad results on number 8 it could be as simple as an injector, but more testing would rule that out or in. Does not sound like a compression issue though.
 
#26 ·
It had almost a rough pulsing feel to it and the smoke was a blueish white upon start up. It didnt look like the smoke plume you would get it the injectors were failing but then again im only 23 so i havent seen everything. Again thank you everyone for your help and input
 
#28 ·
Yeah i just picked up a chiltons and found some other stuff online.

Someone said that the turbo was "dusted" what in the hell does that mean. Overall it looks fine. The input shaft is solid and the impellers look as if they were new so im confused..
 
#30 ·
Dusted means injesting of dust through the turbo. It kills the motor. The first sign of a dusted motor is the fins on the turbo looking all chewed up and nicked up.
 
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